Home / 13,855.28-19,118.07-7,887.06

Finding the Fourth Proportional to 13,855.28, 19,118.07 and 7,887.06

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Solution

The fourth proportional to 13,855.28, 19,118.07 and 7,887.06 is: 10,882.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.28 : 19,118.07 = 7,887.06 : x
  2. Step 2: Convert to fraction form
    13,855.28/19,118.07 = 7,887.06/x
  3. Step 3: Cross multiply
    13,855.28x = 19,118.07 × 7,887.06
  4. Step 4: Simplify right side
    13,855.28x = 150,785,365.17
  5. Step 5: Solve for x
    x = 150,785,365.17/13,855.28
  6. Step 6: Final answer
    x = 10,882.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.